Clean-out for excavator-buckets.



H. J. BENTSON. CLEAN-OUT FOR EXOAVATOR BUOKETS.

APPLICATION FILED FEB. 23,1909.

Patented Mar. 26, 1912.

3 SHEETS-SHEET 1.

msanlullluunllllnnm COLUMBIA FLANOGIAPM C0,. WASHINGTON. D. c.

H. J. BENTSON.

GLEAN-OUT FOR EXGAVATOR BUGKETS. APPLICATION nun PEB.234,1909.

PaEented Mar. 26, 1912.

3 SHEETS-SHEET 2.

coLLfluialA PLANOGIAPII (0.. wAsulNu'ron. I), 6y

H. J. BENTSON.

CLEAN-OUT FOR EXOAVATOR BUGKETS.

APPLIOATION FILED IEB.23,1909.

1,020,958, Patented Mar. 26, 1912.

3 8HBBTSSHEET 8.

UNITED STATES PATENT OFFICE.

HANS J'. BENTSON, OF WIN'IHROP HARBOR, ILLINOIS, ASSIGNOR TO FREDERICKC. AUSTIN, OF CHICAGO, ILLINOIS.

CLEAN-OUT FOR EXCAVATOR-BUCKETS.

Application filed February 23, 1909.

To all whom, it may concern:

Be it known that I, HANS J BnNTsoN, a citizen of the United States ofAmerica, and resident of l/Vinthrop Harbor, Lake county, Illinois, haveinvented a certain new and useful Improvement in Clean-Outs for EX-cavator-Buckets, of which the following is a specification.

My invention relates to traveling buckets in general, but moreparticularly to those employed in excavating machines, and especially tothose which are operated back and forth on a runway, being caused toautomatically upset and dump the load at a certain point in the lengthof said runway, usually at the outer end thereof.

The object of my invention is to provide an arrangement whereby thebucket, in dumping, will have the interior surface thereof scrapedperfectly clean, thereby insuring a complete and prompt discharge eachtime the bucket is upset to dump the load.

It is also an object to provide a scraper, for the above purpose, whichwill not interfere with the proper filling or loading of the bucket.

To these and other useful ends, my invention consists in mattershereinafter set forth and claimed.

In the accompanying drawingsl ignre 1 is a side elevation of a bucketand runway therefor embodying the principles of my invention, the bucketbeing shown approaching the dumping position of the runway. Fig. 2 is across section on line 22 in Fig. 1. Fig. 3 is a View showing the bucketin partial dumping position, the scraper being shown half-way across thebottom of the bucket. Fig. 4 is a view similar to Fig. 1, but showingthe bucket in full dumping position. Fig. 5 is a plan of the structureshown in Fig. 1.

As thus illustrated, the runway A comprises two paralled tracks or waysc-a that are widened at a to form a drop or depression in the runway forupsetting the bucket B when the latter reaches the outer end of therunway. The said bucket has flat sides Z -o and a curved bottom I), thelatter being formed on the line of a circle having as its center thepoint 5 near the upper ends of the sides. Atthe point 5 a rod 6 isinserted through the sides of the bucket, and'provided at its outer endswith Specification of Letters Patent.

Patented Mar. 26, 1912.

Serial No. 479,323.

wheels 7) which travel in the tracks a of the runway. The upper edges ofthe bucket are provided with side bars I) which are connected at theirrear ends by a rod Z) provided at its ends with wheels b that travel inthe said tracks.

A bail-shaped member C of strap iron is mounted at its sides on the rod6 inside the bucket, so that the transverse end portion 0 of the bailwill sweep across the inner curved surface of the bottom of the bucket.The sides 0' of the bail act as scrapers for the inner surfaces of thesides of the bucket. The outer end portions of the bail are connected bya cross piece 0 having wheels 0 at the ends thereof, which wheels alsotravel in the tracks of the runway. An operating cable D may be securedto the cross piece 0 to pull the bucket forward; and a cable E can besecured to the rod 7) to pull the bucket backward.

Vhcn the bucket reaches the portion a. in the runway, the wheels dropdown and cause the scraper C to move into the position shown in Fig. 3,and then into the po' sition shown in Fig. 4, thus completely scrapingout the contents of the bucket, leaving the interior thereof clean andfree for adhering masses of earth. While the bucket is loading. andwhile it is moving along the straight portion of the runway, the saidscraper occupies the position shown in Fig. 1, and does not interferewith the filling or loading of the bucket. Thus the load isautomatically dumped by the upsetting of the bucket, and the interior ofthe bucket is automatically scraped to free it of the load, which is ofadvantage when the excavation is being carried on in clay or other wetand sticky soil.

The draft of the cable D is on the frame C, and hence on the clean-outdevice provided by the inner end of said frame, rather than directly onthe bucket. This, I find, insures the desired dumping and cleaning outoperations when the bucket reaches the portions a of the runway.

I do not limit myself to the exact construction shown and described.

What I claim as my invention is:

1. A traveling bucket, a runway, wheels on the bucket engaging therunway, a scraper for the interior of the bucket, pivoted on the sidesof the bucket, wheels on one end of said scraper engaging the runway,and means on said runway for causing the bucket to tilt and the scrapertomove across the interior thereof.

2. In an excavator, a traveling bucket, a bail-shaped scraper for theinterior thereof, adapted to travel with the bucket, and means forautomatically operating said scraper to dump the load, said scraperbeing pivoted to swing downward in the direction of discharge from saidbucket.

3. In an excavator, a traveling bucket, a runway, wheels on the bucketengaging the runway, a scraper for the interior of the bucket, pivotedon the sides of the bucket, wheels on one end of said scraper engagingthe runway, and means on said runway for causing the bucket to tilt andthe scraper to move across the interior thereof, said scraper beingpivoted to swing downward in the direction of discharge from saidbucket.

4. The combination, in a machine of the character set forth, of atraveling bucket. an automatic scraper for the inner surface thereof, arunway upon which the bucket travels back and forth, and means on therunway for tilting the bucket and operating the scraper to discharge theload.

5. The combination, in a .machine of the character set forth. of atraveling bucket, a scraper for the interior thereof. adapted to travelwith the bucket, means for tilting the bucket and thereby causing thescraper to move across the inner surface of the bucket, a runway uponwhich the bucket travels back and forth, means on the runway for tiltingthe bucket and operating the scraper to discharge the load, and meansconnected with the scraper for drawing the bucket forward.

6. The combination, in a machine of the character set forth, of atraveling bucket, a bail-shaped scraper for the interior thereof, meansfor automatically operating said scraper to dump the load, a runway uponwhich the bucket travels back and forth, and means on the runway fortilting the bucket and operating the scraper to discharge the load.

7. The combination, in a machine of the character set forth, of animproved. scraper for a traveling excavator bucket, adapted to travelwith the bucket substantially as shown and described, runway upon whichthe bucket travels back and forth, means on the runway for tilting thebucket and operating the scraper to discharge the load, and meansconnected with the scraper for drawing the bucket forward.

8. In a machine of the character disclosed, a traveling bucket, anautomatic scraper for the inner surface thereof, adapted to travel withthe bucket, a runway for the bucket, means connected with the scraperfor moving the bucket forward on the runway, and means on the runway fortilting the scraper to discharge the load from said bucket.

9. In a machine of the character disclosed, a traveling bucket, ascraper for the interior thereof, adapted to travel with the bucket,means for tilting the bucket and thereby causing the scraper to moveacross the inner surface of the bucket, a runway for the bucket, meansconnected with the scraper for moving the bucket forward on the runway,and means on the runway for tilting the scraper to discharge the loadfrom said bucket.

10. In a machine of the character disclosed, a traveling bucket, abail-shaped scraper for the interior thereof, means for aiiitomaticallyoperating said scraper to dump the load, a runway for the bucket, meansfor moving the bucket back and forth on the runway, and means on therunway for tilting the scraper to discharge the load from said bucket.

11. In a machine of the character disclosed, the improved scraper for atraveling excavator bucket, adapted to travel with the bucketsubstantially as shown and described, a runway for the bucket, meansconnected with the scraper for moving the bucket forward on the runway,and means on the runway for tilting the scraper to discharge the loadfrom said bucket.

12. An excavator bucket provided with a draft connection, and a swingingclean-out for the bucket rigid with said draft connec tion.

1.3. A runway, a frame having wheels traveling on said runway, a bucketpivoted to the middle portion of said frame, sothat one end thereofprojects within the bucket to act as a clean-out therefor, wheels on thebucket traveling on said runway, means attached to the outer end of theframe for drawing the bucket forward, and means for automaticallyupsetting the bucket.

14. A bucket, a clean-out therefor, a runway, wheels for the buckettraveling on the runway, and separate wheels for the cleanout alsotraveling on said runway.

15. In a bucket excavator, a bail-shaped pivoted clean-out travelingwith the bucket along the runway, in engagement therewith, andautomatically operated by the runway to clean out the bucket when theload is dumped.

Signed by me at Chicago, Illinois, this first day of February, 1909.

HANS J. BENTSON.

W itnesses CLARENCE E. TAYLOR, E. H. CLEGG.

Copies of this patent may be obtained for five addressing theCommissioner of Patents,

Washington, 13.0.

